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(No Model.) 4 Sheets-Sheet 1. G. 'H. LOUTZENHISER.

OSGILLATING SIEVE 0R BOLTING MACHINE. No. 602,341. Patented Apr.12,1898.

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0. H. LOUTZE NHISER. OSUILLATING SIEVE OR BOLTING, MACHINE. No. 602,341.

(No Model.)

(No Model.) 4 SheetsSheet 34 G. H. LOUTZENHISER. OSGILLATING SIBVE ORBOLTING MACHINE.

No. 602,341. Patented Apr. 12,1898.

(No Model.) Y 4 Sheets-Sheet 4.

. 0.1-1. LOUTZENHISER. Y OSGILLATING SIEVB 0R BOLTING MACHINE. No.602.341. Patented Apr. 12,1898.

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NITED STATES CHARLES H. LOUTZENHISER, OF PHILADELPHIA, PENNSYLVANIA,ASSIGNOR TO WALTER GRISCOM AND THOMAS MOFEELY, OF SAME PLACE.

OSCILLATING SIEVE on BOLTING-MACHINE.

SPECIFICATION forming part of Letters Patent N0.'602,341, dated April12, 1898. Application filed March 13, 1897. Serial No. 628,190. (Nomodel.)

To all whom it may concern.-

Be it known that I, CHARLES H. LOUTZEN- HISER, a citizen of the UnitedStates, residing in Philadelphia, Pennsylvania, have invented certainImprovements in Oscillating Sieves or Bolting-Machines, of which thefollowing is a specification.

My invention consists of certain improvements in oscillating or gyratingbolting-machines, the objects of my invention being to simplify thedriving mechanism of the machine; to so mount and drive the sieve boxesor casings as to provide an effective counterbalance; to cut off anydesired part of either sievethat is to say, to separate the dischargefrom one part from thatfrom another part of the sieve; to provide forvariation in the angle of the sieves, and to permit of the introductionof material to a lower sieve of the series without passing the samethrough the upper sieves or the discharge of material from an uppersieve or sieves without passing through the lower sieve or sieves. Theseobjects I attain in the manner hereinafter set forth, reference beinghad to the accompanying drawings, in which Figure 1 is a plan view of anoscillating or gyratin g sieve or bolting-machine constructed inaccordance with my invention. Fig. 2 is a view looking at the inner sideof one of the sieve-boxes. Fig. 8 is a view, partly in side elevationand partly in section, on the line 1 y, Fig. 1. Fig. 4 is an end view ofthe machine. Fig. 5 is a section on the line w w, Fig. 3. Fig. 6 is anenlarged view of part of the machine. Fig. 7 is a view illustrating amodification. Fig. 8 is an enlarged detail View.

The various posts or bars of the fixed framework of the machine arerepresented at 1, and to upright posts at each end of the 7 machine aresecured brackets 2, carrying the bearings for the longitudinaldriving-shaft 3, which has a pulley 4: for receiving a belt 5, runningto any available adjacent driving-pulley.

At each end of the shaft 3 is abeVel-wheel 6, which meshes with abevel-pinion 7 on an upright shaft 9, mounted in bearings uponcross-bars 10, carried by the end posts lot the fixed framework. Each ofthese shafts 9 has oppositely-set crank-pins, which are adapted to boxeson brackets 11 and 12, the brackets 11 carrying a longitudinal bar 13,secured to a sieve-box 14, while the brackets 12 carry a longitudinalbar 15, secured to another sieve-box 16, parallel with and along side ofthe box 14:, it being understood that the correspondingly-set crank-pinsof each shaft are secured to the same box, so that as the shafts 9 arerotated a gyrating movement will be imparted to each of the sieve-boxes,the movement of one box being the exact opposite of thatof the otherbox, so that the boxes serve to counterbalance each other and therebylessen or prevent vibration.

- It will be observed on reference to Figs. 4 and 5 that thecorrespondingly-set cranks are respectively an upper crank of the pairat one end of the machine and a lower crank of the pair at the oppositeend of the machine. Hence the bars 13 and 15 are inclined in respect tothe horizontal, as shown in Fig. 2, thereby servingto stiifen and braceeach of the boxes against lateral twisting or tilting strain in a muchmore effective manner than they could if they extended horizontally fromone end of the box to the other.

Each box is supported upon three struts 17, which are adapted at theiropposite ends, re-

spectively, to sockets 19 on the under sidesof the boxes and to sockets20 on the basebars of the fixed frame, the three struts occupying theangles of a triangle, as shown by dotted lines in Fig. 1, the centralstrut being under the inner portion of each box and the outer strutsbeing under the outer portion of the same. By this means the support isevenly distributed throughout each box with the employment of a lessnumber of supporting devices than are usually required. A limited numberof struts can thus be employed, because the boxes are supported in ameasure at each of the inner corners by the brackets with which thedriving devices engage.

The use of the longitudinal bars 13 and 15 is of advantage, as said barscan be applied to the brackets and the running of the machine adjustedand regulated before the sieveboxes are applied.

At the end which receives the stock to be bolted or separated each ofthe sieve-boxes is stepped, as shown in Figs. 2 and 3, so that the stockwhich is delivered to the lower sieve or set of sieves in the box doesnot have to pass through the upper sieve or set of sieves, and in likemanner each box is stepped at the discharge end, so that while sieves ofthe same length are used in both the upper and lower sets said sievesare offset or overlapped. Hence the feed to the lower sieve or sievesand the discharge from the upper sieve or sieves are not obstructed byintervening sieves.

In the presentinstance I have shown a sieve system comprising threesieves, two sieves'2l and 22 in the upper portion of each box and onesieve 23 in the lower portion, the upper sieves 21 and 22 receivingtheir supply of stock from a spout or spouts 21 at the topof the machineand the lower sieve receiving its supply from a spout 23 on the step 24at the end of the machine. Each sieve has beneath it a pan 25, whichdirects the material passing through the sieve onto the upper end of thesieve below, and with each sieve is combined an adjustable cut-off,which, as shown in Fig. 3, consists of an apron 26, located between thesieve and the pan and passing around a roller 27 just inside of thedischarge end of the sieve, the free ends of each apron havingtransverse bars 28, which are connected by cords 29 to a drum 30,passing transversely through the box and having on the outside of thesame a handle 31 or equivalent means whereby it may be turned. Thetransverse bar at the end of the lower run of each apron is guided ingrooves or ways 28, formed in the opposite sides of the sieve-casing,and said lower run of the apron follows the general angle of the panbeneath the sieve, so that any material falling onto the upper side ofsaid lower run of the apron is directed onto said pan. By this means theupper run of the cut-off apron may be caused to extend more or lessinward from the discharge end of the sieve beneath which it is located,and hence the area of said sieve which discharges into the pan beneathmay be increased or diminished in accordance with the character of thestock which is being acted upon, the material which passes through thesieve and falls upon the upper run of the apron being delivered by thelatter through a spout adjoining the tailings-spout for said sieve. Ifthe roller 27 is a spring-roller upon which the apron is wound, thelower run of the apron and the lower cord 29 will be unnecessary.

In Fig. 7 I have shown a modified form of cut-off, consisting of anapron secured at each end and passing over a transverse bar 40, guidedin ways 41 in the sides of the sieveeasin g and movable back and forthby means of a winding-drum 42 and cord 43 and pulley 44, the top of thisbar being some distance above the ends of the apron, so that the latterslopes in opposite directions from the bar. By moving the bar to andfro, therefore, the apex of the angle of the apron can be changed and avariable separation of the discharge from the sieve can be effected, asbefore.

The lower end bar 32 of each screen is supported upon a shoe 33, whichrests upon an eccentric 34, carried by a spindle 34, which passesthrough the sieve-box at the tailings end of the same and has a handle35, whereby the spindle and its eccentric may be turned so as to raiseor lower the lower end of either sieve, and thereby vary the angle ofthe same to suit the character of the stock which is being acted upon,the spindle being squared or otherwise formed so that the handle canslide thereon, whereby a thumb-nut 36 upon the outer end of theeccentric-spindle can press the handle against the end of the casing andthus secure the eccentric in position after each adjustment. Thestepping of the casing at the discharge end of the same besidesproviding for a free discharge from the upper sieve or sieves alsopermits ready access to the adjusting devices for the lower sieve orsieves.

It will be observed that there is a practically rigid connection betweeneach end of each box and the crank-pin which operates it. Hence there isno opportunity for derangement due to loose connections or to wear orloose fit of movable connecting parts, the boxes and their bracketspractically forming rigid connections between the opposite crankpins, sothat smoothness and uniformity of movement are assured.

Having thus described my invention, I claim and desire to secure byLetters Patent- 1. The combination in an oscillating sieve orbolting-machine, of a pair of sieve-boxes located side by side, uprightshafts at the ends of the boxes, each having oppositely-set crank-pins,and brackets projecting from the opposite ends of the sieve-boxes andengaging said crank-pins, an upper crank of one shaft and a lowercorrespondingly-set crank of the other shaft being connected to eachbox, substantially as specified.

2. The combination of a bolting-sieve with an adjustable cut-offconsisting of an apron located beneath the sieve and passing around abearing adjacent to the discharge end of the same, the opposite ends ofsaid apron being connected by cords to a winding-drum in advance of theapron, whereby on turning said drum the apron may be positively moved ineither direction, substantially as specified.

3. The combination of a bolting-sieve with an adjustable cut-oftconsisting of an apron located beneath said sieve and passing around abearing adjacent to the discharge end of the same, a winding-drumlocated in advance of the apron, cords wound upon said drum andconnected to the opposite ends of the apron, and inclined guides for theend of the lower run of the apron, whereby said lower run is directed atan angle the reverse of that of the upper run, substantially asspecified.

4. The combination of the sieve-frame of a bolting-machine, with aneccentric serving as a support for the lower end of said frame, an

eccentric-spindle passing through the sievecasing and having outside thesame a sliding handle whereby it may be turned, and a nut mounted onsaid spindle beyond the handle, substantially as specified.

5. The combination in an oscillating sieve or bolting-machine, of a pairof upright crankshafts, brackets having boxes receiving the cranks ofsaid shafts, a longitudinal bar car-

